Chapter 4: Using the Chart 113
Note:
Radar range synchronization is not available when the chart motion mode is set
to Autorange. The chart can be synchronized with either the 3D chart or the radar but
not both. You cannot sync with radar if dual range is enabled in the radar application.
Viewing MARPA targets on the chart
The Mini Automatic Radar Plotting Aid (MARPA) function is used for target tracking
and risk analysis. Although set up in radar mode or radar overlay, all MARPA targets
are displayed in the chart window, from which you can also access MARPA functions.
For detailed information about MARPA, see
page 152
.
Note:
MARPA does not function if the Digital Scanner is set to Dual Range.
To access MARPA controls from the chart application
1. Highlight a MARPA target with the cursor.
or
1. If radar overlay is switched on, press the RADAR OPTIONS softkey.
2. Press the TARGET TRACKING softkey.
Radar options:
• Target tracking
•Gain
• Target display
• Change range (using the Range button)
Navigation options:
•Route
•Track
AIS
If you have an automatic identification system (AIS) fitted to your vessel, you can use it
to:
• Display the position of other craft which are appropriately enabled with AIS.
• Display broadcast AIS information from appropriately-equipped vessels including
position, course, speed, rate of turn and other safety-critical data.
• Set up a safe zone around your vessel.
• Receive AIS alarms and safety-related messages.
This information is displayed in an overlay. Additional data, when available, is
displayed in a dialog box.
81244_4.book Page 113 Thursday, January 31, 2008 1:53 PM
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